cairo-type-serialization

name: cairo-type-serialization description: Explain Starknet ABI serialization of Cairo types, including arrays, structs, enums, and integers; use when a request involves calldata encoding or Serde behavior.

Cairo Type Serialization

Overview

Explain how Cairo types are serialized to felt252 values for calldata, events, and storage interaction.

Quick Use

• Read references/type-serialization.md before answering.
• Identify whether a type fits in one felt or requires multi-felt encoding.
• Use Serde-derived behavior as the default.

Response Checklist

• Mention length prefix for arrays and spans.
• Explain enum encoding as variant index plus payload.
• For multi-limb integers, state the limb ordering.

Example Requests

• "How is a u256 serialized in calldata?"
• "How does enum serialization work?"
• "What does ByteArray serialize to?"